CN108444967B - Image processing technology-based modified asphalt effect evaluation method - Google Patents
Image processing technology-based modified asphalt effect evaluation method Download PDFInfo
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Abstract
The invention relates to a method for evaluating the effect of modified asphalt based on an image processing technology, which comprises the steps of firstly, manufacturing a polymer modified asphalt sample with good observation effect, and obtaining a fluorescence microscopic image under the observation of a fluorescence microscope; the fluorescence microscopic image obtained in step S1 is then subjected to binary image acquisition: sequentially carrying out gray level image acquisition, gray level image denoising, gray level image equalization, image filling, Ostu threshold segmentation and image opening operation on the fluorescence microscopic image; and finally, extracting image characteristic parameters based on the binary image obtained in the step S2, and performing evaluation index numerical calculation to judge the modification effect of the polymer modified asphalt. The method can quickly and efficiently judge the modification effect of the polymer modified asphalt and has low cost.
Description
Technical Field
The invention relates to the field of battery testing, in particular to a modified asphalt effect evaluation method based on an image processing technology.
Background
With the continuous and deep research on asphalt performance at home and abroad, the fluorescence microscope technology is brought forward as an auxiliary means for detecting asphalt performance. The distribution characteristics of the polymer phase state in the asphalt can be conveniently and efficiently judged through a fluorescence microscope technology, so that the thermodynamic compatibility of the asphalt and the polymer is judged, and the modification effect of the polymer modified asphalt is judged.
The sample preparation of the polymer modified asphalt can influence the observation result, the flaking temperature and the flaking film thickness are main factors influencing the observation of the dispersion state of the polymer modified asphalt, and the preparation of the standard sample can be realized by the device and the method for flaking the polymer modified asphalt with the uniform film thickness and temperature control; in addition, in the fluorescence microscope technology, the method for acquiring images and the method for processing the images are different, and the unified standard is not provided. Even in the same type of method, the steps adopted by different researchers are different, which results in great difference of morphological parameters of polymer phases obtained after treatment and influences the evaluation of the effect of the polymer modified asphalt.
Disclosure of Invention
In view of the above, the present invention provides an image processing technology-based method for evaluating the effect of modified asphalt, which can quickly and efficiently judge the modification effect of polymer modified asphalt and is low in cost.
The invention is realized by adopting the following scheme: a modified asphalt effect evaluation method based on an image processing technology specifically comprises the following steps:
step S1: manufacturing a polymer modified asphalt sample with good observation effect, and obtaining a fluorescence microscopic image under the observation of a fluorescence microscope;
step S2: binary image acquisition is performed on the fluorescence microscopic image obtained in step S1: sequentially carrying out gray level image acquisition, gray level image denoising, gray level image equalization, image filling, Ostu threshold segmentation and image opening operation on the fluorescence microscopic image;
step S3: and (4) extracting image characteristic parameters based on the binary image obtained in the step (S2), and performing evaluation index numerical calculation to judge the modification effect of the polymer modified asphalt.
Further, in step S1, the good polymer modified asphalt sample is prepared by a temperature-controlled sheet-making device capable of measuring the uniform film thickness of the polymer modified asphalt;
the polymer modified asphalt temperature-control sheet making device capable of measuring the uniform film thickness comprises a box body, and an ultrasonic measuring assembly, a temperature-control uniform heating assembly, a display assembly and an adjusting control assembly which are arranged in the box body;
the ultrasonic measuring component comprises a probe pen 1 and an ultrasonic measuring instrument; the system comprises a probe pen 1, an ultrasonic measuring instrument and a display screen, wherein the probe pen 1 is used for generating and receiving ultrasonic waves under the trigger of high-frequency electric pulses, the ultrasonic measuring instrument is used for measuring the film thickness of a polymer modified asphalt sheet, and the ultrasonic measuring instrument is respectively connected with the probe pen 1 and the display screen;
the temperature control uniform heating assembly comprises an induction cooker, a metal plate arranged on the induction cooker, heat conduction oil arranged in a cavity above the metal plate, an iron-aluminum alloy platform plate positioned on the upper part of the heat conduction oil, and a temperature control instrument; the induction cooker is used for enabling the metal plate to generate heat; the metal plate is used for transferring heat to heat conduction oil, and the heat conduction oil is used for transferring heat to the iron-aluminum alloy platform plate; the iron-aluminum alloy platform plate is used for bearing the glass slide and uniformly heating the glass slide, the temperature controller is used for measuring the temperature in the heat conduction oil through a thermometer, and the temperature controller is electrically connected with the induction cooker so as to control the working temperature of the induction cooker;
the display assembly comprises an indicator light and a display screen; the indicating lamp and the display screen are electrically connected with the starting button;
the adjusting control component comprises a starting button and a temperature setting button; the starting button is connected with the temperature controller, the induction cooker and the ultrasonic measuring component; the temperature setting button is used for controlling the temperature of the heat conducting oil and is connected with a temperature control instrument.
The working steps are as follows:
step S1: placing the device on a laboratory bench, adjusting the foot screw 17, observing the bubbles in the circular level and centering the bubbles;
step S2: placing the glass slide on a platform plate, placing the glass slide according to the required number of the slide, and digging asphalt with the mass of about 0.5g to place the asphalt on the glass slide;
step S3: the device is started through a starting button, and the indicator light is displayed as a green light; setting a heating temperature T2 by using a temperature setting button and displaying the temperature through the display screen, wherein the temperature of the platform plate and the heat conducting oil displays the current flaking temperature T1 in real time through the display screen;
step S4: when the temperature of the platform plate, namely the temperature of the display screen T1, reaches the set temperature, namely the temperature of the display screen T2, a cover glass is put on, an ultrasonic measuring instrument is started, the cover glass is pressed by the probe pen 1 to prepare a film, the film thickness is measured in real time, and the film thickness is displayed by a display screen D;
step S5: the detection pen 1 can control the thickness of the polymer modified asphalt flake film to be uniform within a certain range through multi-point measurement;
step S6: after the sheet is produced, the sheet can be transferred by using heat-insulating gloves or other transfer tools, and after the sheet is cooled to room temperature, the sheet is placed under a fluorescence microscope, images are observed, and the images are obtained and stored by using a BMP format.
Wherein, the size of the probe pen 1 is: the diameter is 5mm, long 150mm, and the nib is the round platform of height 5mm, and the round platform diameter is 1 mm. The bottom of the box body is provided with a plurality of height-adjustable foot screws 17, and the surface of the box body is provided with a circular level. The metal plate is an iron plate; the heat conducting oil is methyl silicone oil; the temperature controller is an electric contact type thermometer. The controllable precision of the ultrasonic measuring instrument for measuring the thickness of the film is as follows: 0.01 mm. The temperature controller is used for controlling the working state of the induction cooker and further controlling the temperature of the platform plate, and the temperature control range is as follows: 20-200 ℃.
Further, the magnification of the fluorescence microscope is from x 40 to x 4000, and the storage format of the fluorescence microscope image is BMP.
Further, in step S2, the sequential performing of gray scale image acquisition, gray scale image denoising, gray scale image equalization, image filling, Ostu threshold segmentation, and image opening operation on the fluorescence microscopic image is implemented in Matlab software. The image denoising is used for carrying out noise elimination on the gray level image; the gray level image equalization is used for enabling the gray level image to be clearer; the image fill fills in internal blank portions of the polymer phase; the Ostu threshold partitioning is used to compute a partitioning threshold; and the image opening operation is to perform opening operation on the segmented image (namely, the image is corroded and then expanded, and the times can be determined according to needs), so that the binary image can be obtained.
Further, in step S3, the Image feature parameter extraction is implemented in Image Pro Plus software.
Further, the image characteristic parameters comprise shape area, equivalent polygon area, fractal dimension, equivalent circle diameter, height and width of an equivalent rectangle, roundness and inertia of a polymer relative to an X axis and a Y axis.
Further, the evaluation index numerical value calculation includes:
characterization index D of polymer mixing amountPCalculated using the following formula: dP＝A1/A0Wherein A is1Is a shape area or an equivalent polygonal area, A0Calculating the area of the region;
the polymer shape characterization index R, namely roundness is one of Image characteristic parameters, and the R is calculated in a self-contained calculation mode of software Image Pro Plus;
a polymer and asphalt boundary characterization index, namely a fractal dimension, is one of Image characteristic parameters and is calculated by adopting an Image Pro Plus self-contained calculation mode;
polymer dispersibility characterization index:
calculated using the formula:
wherein S isiIs the polymer area of each zone;
polymer homogeneity characterization index I, calculated using the formula: i isx/IyWherein, IxAnd IyThe inertia of the polymer with respect to the X-axis and Y-axis, respectively.
Further, the grayscale image denoising is used for removing tiny particles which have almost no influence on macroscopic performance in the polymer modified asphalt, and further reducing the influence on characteristic parameters of a polymer phase. The image opening operation is used for corroding and then expanding the binary image, so that a tiny object can be eliminated, the object is separated at a fine point, and the area of the object is not obviously changed when the boundary of a large object is smoothed.
According to the device and the method for preparing the polymer modified asphalt capable of measuring the film thickness and uniform temperature control, the uniform temperature control and the film thickness measurement can be simultaneously realized for preparing the polymer modified asphalt, so that the influence of sample errors on the observation of a fluorescence microscope technology is reduced; observing the sample by using a fluorescence microscope to obtain an image, and performing gray processing, Ostu method threshold segmentation, polymer phase parameter extraction and the like on the image according to a Matlab image processing program code to obtain a binary image; and the characteristic parameters of the binary Image are acquired through Image Pro Plus software, so that the physical compatibility of the asphalt and the polymer, the polymer mixing amount, the polymer dispersion state and the like can be judged based on the characteristic parameters, and the modification effect of the polymer modified asphalt is evaluated.
Compared with the prior art, the invention has the following beneficial effects: the invention is a complete set of evaluation method for the modification effect of polymer modified asphalt based on image processing; by combining multiple devices and methods, the obtained polymer modified asphalt sample wafer can be ensured to be uniform and controllable in temperature and measurable in film thickness when being heated, and the interference of external factors on the observation effect of a fluorescence microscope is reduced as much as possible; the invention can ensure that the obtained gray level image and the binary image are more consistent with the actual image; the method can quickly and efficiently judge the modification effect of the polymer modified asphalt and has low cost.
Drawings
FIG. 1 is a schematic flow chart of the method of the present invention.
FIG. 2 is a schematic structural diagram of a device for producing polymer modified asphalt with uniform measurable film thickness and temperature control.
FIG. 3 is a top view of the structure of the temperature-controlled sheet-making device for measuring uniform film thickness of polymer modified asphalt of the present invention.
FIG. 4 is a schematic diagram of the right view of the structure of the temperature-controlled sheet-making device for measuring uniform film thickness of the polymer modified asphalt of the present invention.
Fig. 5 is a schematic diagram of a part of image processing codes in Matlab of the present invention.
Fig. 6 is a schematic diagram of binary image analysis according to an embodiment of the present invention.
In the figure, 1 is a probe pen 1, 2 is a platform plate, 3 is heat conducting oil, 4 is an electromagnetic oven, 5 is a temperature controller, 6 is a display screen, 7 is a button control area, 8 is a heat insulating material, 9 is an indicator lamp, 10 is a heat conducting oil level, 11 is an electric connection type thermometer, 13 is a sample to be subjected to sheet making, 14 is an oil conveying hole, 15 is a metal plate, 16 is a circular level gauge, 17 is a foot spiral 17, and 18 is a box body.
In fig. 2 to 4, a is an ultrasonic measurement module, B is a temperature-controlled uniform heating module, C is a display module, and a regulation control module D.
Detailed Description
The invention is further explained below with reference to the drawings and the embodiments.
As shown in fig. 1, this embodiment provides a modified asphalt effect evaluation method based on an image processing technology, which specifically includes the following steps:
step S1: manufacturing a polymer modified asphalt sample with good observation effect, and obtaining a fluorescence microscopic image under the observation of a fluorescence microscope;
step S2: binary image acquisition is performed on the fluorescence microscopic image obtained in step S1: sequentially carrying out gray level image acquisition, gray level image denoising, gray level image equalization, image filling, Ostu threshold segmentation and image opening operation on the fluorescence microscopic image;
step S3: extracting image characteristic parameters based on the binary image obtained in the step S2, and performing evaluation index numerical calculation to judge the modification effect of the polymer modified asphalt;
in this embodiment, in step S1, the good polymer modified asphalt sample is prepared by a polymer modified asphalt temperature-controlled sheet-making device capable of measuring uniform film thickness;
the device for preparing the polymer modified asphalt with the functions of measuring the film thickness, uniformly controlling the temperature and producing the sheet comprises a box body 18, and an ultrasonic measuring component, a temperature-controlling and uniformly heating component, a display component and an adjusting and controlling component which are arranged in the box body 18;
the ultrasonic measuring component comprises a probe pen 1 and an ultrasonic measuring instrument; the system comprises a probe pen 1, an ultrasonic measuring instrument and a display screen 6, wherein the probe pen 1 is used for generating and receiving ultrasonic waves under the trigger of high-frequency electric pulses, the ultrasonic measuring instrument is used for measuring the film thickness of a polymer modified asphalt sheet, and the ultrasonic measuring instrument is respectively connected with the probe pen 1 and the display screen 6;
the temperature control uniform heating assembly comprises an induction cooker 4, a metal plate 15 arranged on the induction cooker 4, heat conduction oil 3 arranged in a cavity above the metal plate 15, an iron-aluminum alloy platform plate 2 positioned on the upper part of the heat conduction oil 3, and a temperature control instrument 5; the induction cooker 4 is used for enabling the metal plate 15 to generate heat; the metal plate 15 is used for transferring heat to the heat conduction oil 3, and the heat conduction oil 3 is used for transferring heat to the iron-aluminum alloy platform plate 2; the iron-aluminum alloy platform plate 2 is used for bearing glass slides and uniformly heating the glass slides, the temperature controller 5 measures the temperature in the heat conduction oil 3 through a thermometer, and the temperature controller 5 is electrically connected with the induction cooker 4 to control the working temperature of the induction cooker;
the display assembly comprises an indicator light and a display screen 6; the indicator light 9 and the display screen 6 are electrically connected with the starting button;
the adjusting control component comprises a starting button and a temperature setting button; the starting button is connected with the temperature controller 5, the induction cooker 4 and the ultrasonic measuring component; the temperature setting button is used for controlling the temperature of the heat conducting oil 3 and is connected with a temperature controller 5.
The working steps are as follows:
step S1: placing the device on a laboratory bench, adjusting the foot screw 17, observing the air bubbles in the circular level 16, and centering the air bubbles;
step S2: placing the glass slide on a platform plate, placing the glass slide according to the required number of the slide, and digging asphalt with the mass of about 0.5g to place the asphalt on the glass slide;
step S3: the device is started through a starting button, and the indicator light is displayed as a green light; setting a heating temperature T2 by using a temperature setting button and displaying the temperature through the display screen, wherein the temperature of the platform plate and the heat conducting oil displays the current flaking temperature T1 in real time through the display screen;
step S4: when the temperature of the platform plate, namely the temperature of the display screen T1, reaches the set temperature, namely the temperature of the display screen T2, a cover glass is put on, an ultrasonic measuring instrument is started, the cover glass is pressed by the probe pen 1 to prepare a film, the film thickness is measured in real time, and the film thickness is displayed by a display screen D;
step S5: the detection pen 1 can control the thickness of the polymer modified asphalt flake film to be uniform within a certain range through multi-point measurement;
step S6: after the sheet is produced, the sheet can be transferred by using heat-insulating gloves or other transfer tools, and after the sheet is cooled to room temperature, the sheet is placed under a fluorescence microscope, images are observed, and the images are obtained and stored by using a BMP format.
Wherein, the size of the probe pen 1 is: the diameter is 5mm, long 150mm, and the nib is the round platform of height 5mm, and the round platform diameter is 1 mm. The bottom of the box body 18 is provided with a plurality of height-adjustable foot screws 17, and the surface of the box body 18 is provided with a circular level 16. The metal plate 15 is an iron plate; the heat conducting oil is methyl silicone oil; the temperature controller is an electric contact type thermometer. The controllable precision of the ultrasonic measuring instrument for measuring the thickness of the film is as follows: 0.01 mm. The temperature controller is used for controlling the working state of the induction cooker and further controlling the temperature of the platform plate, and the temperature control range is as follows: 20-200 ℃.
The ultrasonic measuring instrument comprises a technical gate, a counter and a decoder and is used for analyzing an ultrasonic signal received by the probe pen and converting the ultrasonic signal into a digital signal of the measured film thickness. The iron-aluminum alloy platform plate is slightly lower than the display screen, so that the sheet is not easy to leave the operating platform. The size of the platform plate can simultaneously manufacture 3 slices. The adjusting control component comprises a starting button, a temperature setting button, a film thickness measuring button and a horizontal adjusting button. The first three buttons are all arranged in the button area 7; the starting button is connected with the temperature controller, the electric furnace and the ultrasonic measuring component; the temperature setting button is used for controlling the temperature of the heat conducting oil to be connected with the temperature controller. The temperature controller receives a heating signal in the heat-conducting oil through an electric contact type thermometer inserted into the heat-conducting oil so as to control the working state of the electric furnace. The temperature of the heat conducting oil can be set in each temperature section below the ignition point of the heat conducting oil through a temperature controller, so as to adapt to the temperature of different polymer modified asphalts in a better dispersion state. The electric furnace is isolated from devices with higher temperature, such as heat transfer oil, by a heat insulating material 8.
In this embodiment, the oil level 10 of the heat transfer oil is controlled through the oil transfer hole 14, so that the iron-aluminum alloy platform plate is heated more uniformly. The content of the display screen comprises three parts, namely the temperature of the platform plate, the set temperature and the thickness of the film from top to bottom.
In this example, the magnification of the fluorescence microscope is × 40 to × 4000, and the fluorescence microscope image storage format is BMP.
In this embodiment, in step S2, the sequential performing of gray scale image acquisition, gray scale image denoising, gray scale image equalization, image filling, Ostu threshold segmentation, and image opening operation on the fluorescence microscopic image is implemented in Matlab software, as shown in fig. 5. The image denoising is used for carrying out noise elimination on the gray level image; the gray level image equalization is used for enabling the gray level image to be clearer; the image fill fills in internal blank portions of the polymer phase; the Ostu threshold partitioning is used to compute a partitioning threshold; and the image opening operation is to perform opening operation on the segmented image (namely, the image is corroded and then expanded, and the times can be determined according to needs), so that the binary image can be obtained.
In this embodiment, in step S3, the Image feature parameter extraction is implemented in Image Pro Plus software.
In this embodiment, the image characteristic parameters include a shape area, an equivalent polygon area, a fractal dimension, an equivalent circle diameter, a height and a width of an equivalent rectangle, a roundness, and an inertia of a polymer with respect to an X axis and a Y axis.
In this embodiment, the evaluation index numerical value calculation includes:
characterization index D of polymer mixing amountPCalculated using the following formula: dP＝A1/A0Wherein A is1Is a shape area or an equivalent polygonal area, A0Calculating the area of the region;
the polymer shape characterization index R, namely roundness is one of Image characteristic parameters, and the R is calculated in a self-contained calculation mode of software Image Pro Plus;
a polymer and asphalt boundary characterization index, namely a fractal dimension, is one of Image characteristic parameters and is calculated by adopting an Image Pro Plus self-contained calculation mode;
polymer dispersibility characterization index:
calculated using the formula:
wherein S isiIs the polymer area of each zone;
polymer homogeneity characterization index I, calculated using the formula: i isx/IyWherein, IxAnd IyThe inertia of the polymer with respect to the X-axis and Y-axis, respectively.
The characteristic parameters are shown in a table 1 and the evaluation indexes are shown in a table 2, and based on the image characteristic parameters and the evaluation indexes, the phase distribution characteristics of the polymer can be evaluated, and the physical compatibility, the polymer mixing amount, the polymer dispersion state and the like of the asphalt and the polymer are judged, so that the modification effect of the polymer modified asphalt is judged.
TABLE 1
TABLE 2
In this embodiment, the grayscale image denoising is used to remove tiny particles in the polymer modified asphalt, which have almost no influence on the macroscopic performance, so as to reduce the influence on the characteristic parameters of the polymer phase. The image opening operation is used for corroding and then expanding the binary image, so that a tiny object can be eliminated, the object is separated at a fine point, and the area of the object is not obviously changed when the boundary of a large object is smoothed.
According to the device and the method for preparing the polymer modified asphalt with the uniform temperature control and measurable film thickness, the uniform temperature control and measurable film thickness can be realized simultaneously for preparing the polymer modified asphalt, so that the influence of sample errors on the observation of a fluorescence microscope technology is reduced; observing the sample by using a fluorescence microscope to obtain an image, and performing gray processing, Ostu method threshold segmentation, polymer phase parameter extraction and the like on the image according to a Matlab image processing program code to obtain a binary image; and the characteristic parameters of the binary Image are acquired through Image Pro Plus software, so that the physical compatibility of the asphalt and the polymer, the polymer mixing amount, the polymer dispersion state and the like can be judged based on the characteristic parameters, and the modification effect of the polymer modified asphalt is evaluated.
The above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the present invention.
Claims (4)
1. A method for evaluating the effect of modified asphalt based on an image processing technology is characterized by comprising the following steps: the method comprises the following steps:
step S1: manufacturing a polymer modified asphalt sample with good observation effect, and obtaining a fluorescence microscopic image under the observation of a fluorescence microscope;
step S2: binary image acquisition is performed on the fluorescence microscopic image obtained in step S1: sequentially carrying out gray level image acquisition, gray level image denoising, gray level image equalization, image filling, Ostu threshold segmentation and image opening operation on the fluorescence microscopic image;
step S3: extracting image characteristic parameters based on the binary image obtained in the step S2, and performing evaluation index numerical calculation to judge the modification effect of the polymer modified asphalt;
in step S1, the good polymer modified asphalt sample is prepared by a temperature-controlled sheet making device capable of measuring the uniform film thickness of polymer modified asphalt;
the polymer modified asphalt temperature-control sheet making device capable of measuring the uniform film thickness comprises a box body, and an ultrasonic measuring assembly, a temperature-control uniform heating assembly, a display assembly and an adjusting control assembly which are arranged in the box body;
the ultrasonic measuring component comprises a probe pen and an ultrasonic measuring instrument; the ultrasonic wave measuring instrument is used for measuring the thickness of a polymer modified asphalt sheet, and is respectively connected with the probe pen and the display screen;
the temperature control uniform heating assembly comprises an induction cooker, a metal plate arranged on the induction cooker, heat conduction oil arranged in a cavity above the metal plate, an iron-aluminum alloy platform plate positioned on the upper part of the heat conduction oil, and a temperature control instrument; the induction cooker is used for enabling the metal plate to generate heat; the metal plate is used for transferring heat to heat conduction oil, and the heat conduction oil is used for transferring heat to the iron-aluminum alloy platform plate; the iron-aluminum alloy platform plate is used for bearing the glass slide and uniformly heating the glass slide, the temperature controller is used for measuring the temperature in the heat conduction oil through a thermometer, and the temperature controller is electrically connected with the induction cooker so as to control the working temperature of the induction cooker;
the display assembly comprises an indicator light and a display screen; the indicating lamp and the display screen are electrically connected with the starting button;
the adjusting control component comprises a starting button and a temperature setting button; the starting button is connected with the temperature controller, the induction cooker and the ultrasonic measuring component; the temperature setting button is used for controlling the temperature of the heat conducting oil and is connected with a temperature control instrument;
the image characteristic parameters comprise shape area, equivalent polygon area, fractal dimension, equivalent circle diameter, height and width of an equivalent rectangle, roundness and inertia of a polymer relative to an X axis and a Y axis;
wherein the evaluation index numerical calculation includes:
characterization index D of polymer mixing amountPCalculated using the following formula: dP＝A1/A0Wherein A is1Is a shape area or an equivalent polygonal area, A0Calculating the area of the region;
the polymer shape characterization index R, namely roundness is one of Image characteristic parameters, and the R is calculated in a self-contained calculation mode of software Image Pro Plus;
a polymer and asphalt boundary characterization index, namely a fractal dimension, is one of Image characteristic parameters and is calculated by adopting an Image Pro Plus self-contained calculation mode;
polymer dispersibility characterization index:
calculated using the formula:
wherein S isiIs the polymer area of each zone;
polymer homogeneity characterization index I, calculated using the formula: i isx/IyWherein, IxAnd IyThe inertia of the polymer with respect to the X-axis and Y-axis, respectively.
2. The method for evaluating the effect of the modified asphalt based on the image processing technology as claimed in claim 1, wherein: the magnification of the fluorescence microscope is multiplied by 40 to 4000, and the storage format of the fluorescence microscopic image is BMP.
3. The method for evaluating the effect of the modified asphalt based on the image processing technology as claimed in claim 1, wherein: in step S2, the sequential gray scale image acquisition, gray scale image denoising, gray scale image equalization, image filling, Ostu threshold segmentation, and image opening operation of the fluorescence microscopic image are implemented in Matlab software.
4. The method for evaluating the effect of the modified asphalt based on the image processing technology as claimed in claim 1, wherein: in step S3, the Image feature parameter extraction is implemented in Image Pro Plus software.
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| CN114353706A (en) * | 2022-01-11 | 2022-04-15 | 哈尔滨工业大学 | Asphalt two-dimensional morphology determination method based on environmental scanning electron microscope |
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